<template>
	<view>
		<view class="goods-list">
			<view v-for="(item, index) in goodsList" :key="index" @click="gotoDetail(item)">
				<my-goods :goods="item"></my-goods>
			</view>
		</view>
	</view>
</template>

<script>
	export default {
		data() {
			return {
				// 请求参数对象
				queryObj: {
					// 查询关键词
					query: '',
					// 商品分类id
					cid: '',
					// 页码数
					pagenum: 1,
					// 每页显示多少条数据
					pagesize: 10
				},
				// 商品列表数据
				goodsList: [],
				// 总数量，用来实现分页
				total: 0,// 是否正在请求数据
				isLoading: false, // 节流阀
			}
		},
		onLoad(options) {
			this.queryObj.query = options.query || ''
			this.queryObj.cid = options.cid || ''
			this.getGoodsList()
		},
		methods: {
			// 获取商品列表数据
			async getGoodsList (cb) {
				// 打开节流阀
				this.isLoading = true
				const { data: res } = await uni.$http.get('/api/public/v1/goods/search', this.queryObj)
				// 关闭节流阀
				this.isLoading = false
				// 使用短路用算法来判断，当这个存在就调用
				cb && cb()
				if (res.meta.status !== 200) return uni.$showMsg()
				
				this.goodsList = [...this.goodsList, ...res.message.goods]
				this.total = res.message.total
			},
			gotoDetail (goods) {
				uni.navigateTo({
					url: '/subpkg/goods_detail/goods_detail?goods_id=' + goods.goods_id
				})
			}
		},
		onReachBottom() {
			if (this.queryObj.pagenum * this.queryObj.pagesize >= this.total) return uni.$showMsg('数据加载完毕！')
			
			if (this.isLoading) return
			// 页面增加
			this.queryObj.pagenum++
			this.getGoodsList()
		},
		// 下拉刷新的事件
		onPullDownRefresh() {
			// 重置数据
			this.queryObj.pagenum = 1
			this.total = 0
			this.isLoading = false
			this.goodsList = []
			
			// 重新发起数据请求
			this.getGoodsList(() => uni.stopPullDownRefresh())
		}
	}
</script>

<style lang="scss">
.goods-list {
}
</style>
